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$407+ Cheap flights from Sofia (SOF) to Boston (BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — BOS
Jun 7 — Jun 141
Sun 6/7
Sun 6/14
1 adult, Economy
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Cheap flight deals from Sofia to Boston

Cheapest flights from Sofia to Boston
Explore the most affordable flight options available from Sofia to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:25 pm
SOF
-
BOS
1 stop28h 40m
Multiple Airlines
Sun 6/1411:30 pm
BOS
-
SOF
2 stops28h 40m
Multiple Airlines
Deal found 5/4$688
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:25 pm
SOF
-
BOS
1 stop28h 40m
Multiple Airlines
Wed 6/1010:50 pm
BOS
-
SOF
2 stops29h 20m
Multiple Airlines
Deal found 5/4$692
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
SOF
-
BOS
2 stops22h 00m
Multiple Airlines
Thu 9/2411:00 pm
BOS
-
SOF
1 stop19h 35m
Multiple Airlines
Deal found 5/3$704
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1810:10 am
SOF
-
BOS
1 stop18h 55m
Multiple Airlines
Thu 6/2511:55 pm
BOS
-
SOF
2 stops26h 50m
Multiple Airlines
Deal found 5/4$708
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2110:10 am
SOF
-
BOS
1 stop17h 55m
Multiple Airlines
Wed 6/39:05 pm
BOS
-
SOF
2 stops21h 30m
Multiple Airlines
Deal found 5/6$709
This Austrian Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:55 pm
SOF
-
BOS
2 stops28h 43m
Austrian Airlines
Thu 9/175:10 pm
BOS
-
SOF
1 stop11h 30m
Austrian Airlines
Deal found 5/7$712
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:25 pm
SOF
-
BOS
1 stop28h 40m
Multiple Airlines
Thu 8/1311:35 pm
BOS
-
SOF
2 stops40h 35m
Multiple Airlines
Deal found 5/5$719
This British Airways deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/158:10 pm
SOF
-
BOS
2 stops29h 38m
British Airways
Sat 2/67:30 am
BOS
-
SOF
1 stop22h 30m
British Airways
Deal found 5/3$727
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:45 am
SOF
-
BOS
2 stops22h 20m
Multiple Airlines
Wed 6/1010:50 pm
BOS
-
SOF
1 stop30h 25m
Multiple Airlines
Deal found 5/4$731
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2212:40 pm
SOF
-
BOS
1 stop15h 25m
Multiple Airlines
Thu 6/411:55 pm
BOS
-
SOF
2 stops28h 15m
Multiple Airlines
Deal found 5/6$732

Find flight deals from Sofia to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$688
(Kiwi.com)

One-way from

$407
(British Airways)

Popular in

February

Cheapest in

January

Average price

$780
Provider with most accurate pricing for Sofia-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Boston Logan Intl flights.
Search Deals
From Sofia to Boston Logan Intl
Search Deals
One-way flight from Sofia to Boston Logan Intl
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 8, 2026.
Use the filters below to find and compare flights from Sofia to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Thu 6/4

6:30 am-3:40 pm

1 stop16h 10m

Boston Logan Intl

Fri 9/18

8:05 pm-11:15 pm

1 stop20h 10m

$795

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Thu 5/21

6:30 am-3:40 pm

1 stop16h 10m

Boston Logan Intl

Wed 6/3

8:05 pm-11:15 pm

1 stop20h 10m

$795

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Fri 6/5

6:20 am-3:40 pm

1 stop16h 20m

Boston Logan Intl

Sat 9/19

8:05 pm-11:15 pm

1 stop20h 10m

$796

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 6/27

6:20 am-8:10 pm

1 stop20h 50m

Boston Logan Intl

Sat 8/8

10:00 pm-10:50 pm

1 stop17h 50m

$797

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 5/26

6:10 am-3:40 pm

1 stop16h 30m

Boston Logan Intl

Mon 6/15

4:15 pm-6:00 pm

2 stops18h 45m

$798
Quickest round-trip

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 6/9

1:05 pm-7:55 pm

1 stop13h 50m

Boston Logan Intl

Thu 9/24

9:40 pm-3:05 pm

1 stop10h 25m

$801

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Wed 6/10

1:50 pm-11:59 pm

2 stops17h 09m

Boston Logan Intl

Fri 9/25

8:05 pm-6:40 pm

1 stop15h 35m

$805

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 7/20

8:00 am-1:50 pm

1 stop12h 50m

Boston Logan Intl

Wed 8/12

8:05 pm-6:40 pm

1 stop15h 35m

$805

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 5/19

2:10 pm-9:25 am

2 stops26h 15m

Boston Logan Intl

Sun 9/6

8:05 pm-11:15 pm

1 stop20h 10m

$806
Cheapest one-way

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 6/15

8:10 pm-6:48 pm

2 stops29h 38m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/3

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Sofia to Boston

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to Boston in May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Sofia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sofia to Boston

How far ahead should I book a flight from Sofia to Boston?

The price you pay for your flight from Sofia to Boston may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Sofia to Boston?

Currently, January is the cheapest month in which you can book a flight from Sofia to Boston (average of $652). Flying from Sofia to Boston in February is currently the most expensive (average of $860). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Sofia to Boston?

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated May 8, 2026.
Read reviews from past customers who have flown KLM,Austrian Airlines, andTurkish Airlines from Sofia to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,511 reviews
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Austrian Airlines
7.6
Good
915 reviews
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Turkish Airlines
7.4
Good
4,355 reviews
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,693 reviews
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
7,981 reviews
KLM
7.8
Good
1,511 reviews

Boarding

7.8

Entertainment

7.2

Overall

7.8

Crew

8.4

Comfort

7.7

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Sofia to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Sofia to Boston?

    United Airlines and Lufthansa can get you from Sofia to Boston in just under 16h 10m. Your travel time can differ by up to . There are 4521 mi between Sofia and Boston.

  • What are the cheapest airlines flying from Sofia to Boston round-trip?

    Austrian Airlines, at $590, was found to be the cheapest airline from Sofia to Boston.Alternate airlines to your destination round-trip include KLM and Lufthansa. Austrian Airlines is priced at 23% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Sofia to Boston one-way?

    The cheapest airline one-way is SWISS, with whom users have recently found tickets for as low as $548. However, be on the lookout for offers from Lufthansa and Austrian Airlines, as they are both options that can get you from Sofia to Boston for a low price.

  • Can I find deals for flights from Sofia to Boston that include hotel bookings?

    Yes. In addition to deals on Sofia to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Boston.

  • Can I find deals for business class flights from Sofia to Boston?

    Yes. Cheapflights offers flight deals from Sofia to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Sofia to Boston?

    Currently, January is the cheapest month in which you can book a flight from Sofia to Boston (average of $652). Flying from Sofia to Boston in February is currently the most expensive (average of $860). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Cambridge
Concord
Hampton Beach
Watertown
Brockton
Seekonk
Cranston
Chelsea
Warwick
Peabody
Seabrook
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy
Waltham
Lowell
Braintree

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Sofia to Boston

Discover the top 7 airlines that operate flights from Sofia to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$590Average$730FlexibilityNo cancel feeOn-time78%
KLMCheapest$592Average$785FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$647Average$789FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$649Average$774FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$651Average$749FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$682Average$833FlexibilityNo cancel feeOn-time77%
ITA AirwaysCheapest$819Average$878FlexibilityNo cancel feeOn-time81%

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